game: cache some calculations for enemies

scenes/enemies/enemy_base.gd

@@ -27,6 +27,7 @@ var is_dead: bool = false
 var health: float
 
 var _path_update_timer: float = 0.0
+var _compute_cache: KeyedCache = KeyedCache.new()
 
 
 func _ready() -> void:
@@ -177,6 +178,7 @@ func _on_animation_player_animation_finished(anim_name: StringName) -> void:
 
 func get_calculated(key: String) -> Variant:
 	# set max move speed to players move speed
+	var compute_func = func():
 		if key == "move_speed":
 			return clampf(
 				EnemyMod.get_calculated(self, key),
@@ -185,9 +187,10 @@ func get_calculated(key: String) -> Variant:
 			)
 		return EnemyMod.get_calculated(self, key)
 
+	return _compute_cache.get_or_compute(key, compute_func)
+
 
 func has_property(key: String) -> bool:
-	for prop in get_property_list():
-		if prop.name == key:
-			return true
-	return false
+	var cache_key = "prop_%s" % key
+	var compute_func = func(): return get(key) != null
+	return _compute_cache.get_or_compute(key, compute_func)

scenes/managers/enemy_manager.gd

@@ -13,6 +13,8 @@ const ENEMY_BAT = preload("res://scenes/enemies/enemy_bat.tscn")
 const ENEMY_SLIME_SMALL = preload("res://scenes/enemies/enemy_slime_small.tscn")
 const SLIME_COLOR_VARIATIONS: Array[Color] = [Color.CHARTREUSE, Color.FUCHSIA, Color.DARK_ORANGE]
 
+var _elapsed_time: float = 0.0
+
 
 func _ready() -> void:
 	timer.wait_time = 1 / spawn_rate
@@ -21,7 +23,12 @@ func _ready() -> void:
 	GlobalConst.sig_set_spawn_rate.connect(_on_set_spawn_rate)
 
 
+func _physics_process(delta: float) -> void:
+	_elapsed_time += delta
+
+
 func _on_timer_timeout() -> void:
+	_on_set_spawn_rate(1.0 + (_elapsed_time / 60.0) ** 2)
 	var enemies = get_tree().get_nodes_in_group(GlobalConst.GROUP_ENEMY)
 	GlobalConst.sig_debug_stats_set.emit("enemy_count", "%s" % len(enemies))
 	var next_enemy: PackedScene
@@ -105,4 +112,7 @@ func _on_stop_spawning(val: bool):
 
 
 func _on_set_spawn_rate(val: float):
-	timer.wait_time = 1 / val
+	timer.stop()
+	timer.wait_time = 1.0 / val
+	timer.start()
+	print_debug("spawn_rate: %s" % timer.wait_time)

scenes/utils/keyed_cache.gd

@@ -0,0 +1,17 @@
+class_name KeyedCache
+extends Resource
+
+var cache = {}
+
+
+func get_or_compute(key: String, compute_func: Callable):
+	if key in cache:
+		return cache["key"]
+
+	var value = compute_func.call()
+	cache["key"] = value
+	return value
+
+
+func invalidate_key(key: String):
+	cache.erase(key)

scenes/utils/keyed_cache.gd.uid

@@ -0,0 +1 @@
+uid://bbshyok4m8nq3